diff --git a/CHANGELOG.md b/CHANGELOG.md
index eba4b7a..8bf13ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,7 @@
-## 0.7.0
+## 0.6.3
+- Patch exports of async functions
+- Fix streaming unzip
+## 0.6.2
 - Replace Adler-32 implementation (used in Zlib compression) with one more optimized for V8
   - Advice from @SheetJSDev
 - Add support for extra fields, file comments in ZIP files
diff --git a/docs/classes/asyncunzipinflate.md b/docs/classes/asyncunzipinflate.md
index 7d0cfd9..befe5f1 100644
--- a/docs/classes/asyncunzipinflate.md
+++ b/docs/classes/asyncunzipinflate.md
@@ -30,7 +30,7 @@ Asynchronous streaming DEFLATE decompression for ZIP archives
 
 ### constructor
 
-\+ **new AsyncUnzipInflate**(`_`: string, `sz`: number): [AsyncUnzipInflate](asyncunzipinflate.md)
+\+ **new AsyncUnzipInflate**(`_`: string, `sz?`: number): [AsyncUnzipInflate](asyncunzipinflate.md)
 
 Creates a DEFLATE decompression that can be used in ZIP archives
 
@@ -39,7 +39,7 @@ Creates a DEFLATE decompression that can be used in ZIP archives
 Name | Type |
 ------ | ------ |
 `_` | string |
-`sz` | number |
+`sz?` | number |
 
 **Returns:** [AsyncUnzipInflate](asyncunzipinflate.md)
 
diff --git a/docs/classes/unzip.md b/docs/classes/unzip.md
index e081410..d0f8292 100644
--- a/docs/classes/unzip.md
+++ b/docs/classes/unzip.md
@@ -49,7 +49,7 @@ The handler to call whenever a file is discovered
 
 ### push
 
-▸ **push**(`chunk`: Uint8Array, `final`: boolean): any
+▸ **push**(`chunk`: Uint8Array, `final?`: boolean): any
 
 Pushes a chunk to be unzipped
 
@@ -58,7 +58,7 @@ Pushes a chunk to be unzipped
 Name | Type | Description |
 ------ | ------ | ------ |
 `chunk` | Uint8Array | The chunk to push |
-`final` | boolean | Whether this is the last chunk  |
+`final?` | boolean | Whether this is the last chunk  |
 
 **Returns:** any
 
diff --git a/package.json b/package.json
index e0693b7..fc98e39 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fflate",
-  "version": "0.6.2",
+  "version": "0.6.3",
   "description": "High performance (de)compression in an 8kB package",
   "main": "./lib/index.cjs",
   "module": "./esm/browser.js",
diff --git a/scripts/rewriteBuilds.ts b/scripts/rewriteBuilds.ts
index 65b1ecf..9d19d13 100644
--- a/scripts/rewriteBuilds.ts
+++ b/scripts/rewriteBuilds.ts
@@ -1,28 +1,39 @@
 import { readFileSync, writeFileSync, unlinkSync, renameSync } from 'fs';
 import { join } from 'path';
 const atClass = /\/\*\* \@class \*\//g, pure = '/*#__PURE__*/';
-const extraneousExports = /exports\.(.*) = void 0;\n/;
+const esModule = /exports.__esModule = true;\n/;
 const libDir = join(__dirname, '..', 'lib');
 const libIndex = join(libDir, 'index.js');
-const lib = readFileSync(libIndex, 'utf-8').replace(atClass, pure).replace(extraneousExports, '');
+const lib = readFileSync(libIndex, 'utf-8')
+  .replace(atClass, pure)
+  .replace(esModule, '')
+  .replace(/exports\.(.*) = void 0;\n/, '');
 
 writeFileSync(libIndex, lib);
 const esmDir = join(__dirname, '..', 'esm');
 const esmIndex = join(esmDir, 'index.js'),
       esmWK = join(esmDir, 'worker.js'),
-      esmNWK = join(esmDir, 'node-worker.js');
+      esmNWK = join(esmDir, 'node-worker.js'),
+      libWK = join(libDir, 'worker.js'),
+      libNWK = join(libDir, 'node-worker.js');
 const esm = readFileSync(esmIndex, 'utf-8').replace(atClass, pure);
 const wk = readFileSync(esmWK, 'utf-8'),
       nwk = readFileSync(esmNWK, 'utf-8');
-unlinkSync(esmIndex), unlinkSync(esmWK), unlinkSync(esmNWK), unlinkSync(libIndex);
-renameSync(join(libDir, 'worker.js'), join(libDir, 'worker.cjs'));
-renameSync(join(libDir, 'node-worker.js'), join(libDir, 'node-worker.cjs'));
+writeFileSync(join(libDir, 'worker.cjs'), readFileSync(join(libDir, 'worker.js'), 'utf-8').replace(esModule, ''));
+writeFileSync(join(libDir, 'node-worker.cjs'), readFileSync(join(libDir, 'node-worker.js'), 'utf-8').replace(esModule, ''));
+unlinkSync(esmIndex), unlinkSync(esmWK), unlinkSync(esmNWK), unlinkSync(libIndex), unlinkSync(libWK), unlinkSync(libNWK);
 unlinkSync(join(libDir, 'worker.d.ts')), unlinkSync(join(libDir, 'node-worker.d.ts'));
 const workerImport = /import (.*) from '\.\/node-worker';/;
 const workerRequire = /var (.*) = require\("\.\/node-worker"\);/;
 const defaultExport = /export default/;
 writeFileSync(join(esmDir, 'index.mjs'), esm.replace(workerImport, name => nwk.replace(defaultExport, `var ${name.slice(7, name.indexOf(' ', 8))} =`)));
 writeFileSync(join(esmDir, 'browser.js'), esm.replace(workerImport, name => wk.replace(defaultExport, `var ${name.slice(7, name.indexOf(' ', 8))} =`)));
-writeFileSync(join(libDir, 'node.cjs'), lib.replace(workerRequire, name => nwk.replace(defaultExport, `var ${name.slice(4, name.indexOf(' ', 5))} =`)));
-writeFileSync(join(libDir, 'browser.cjs'), lib.replace(workerRequire, name => wk.replace(defaultExport, `var ${name.slice(4, name.indexOf(' ', 5))} =`)));
+writeFileSync(join(libDir, 'node.cjs'), lib.replace(workerRequire, name => {
+  name = name.slice(4, name.indexOf(' ', 5));
+  return nwk.replace(defaultExport, `var ${name} = {};\n${name}["default"] =`)
+}));
+writeFileSync(join(libDir, 'browser.cjs'), lib.replace(workerRequire, name => {
+  name = name.slice(4, name.indexOf(' ', 5));
+  return wk.replace(defaultExport, `var ${name} = {};\n${name}["default"] =`)
+}));
 writeFileSync(join(libDir, 'index.cjs'), lib.replace(workerRequire, name => `var ${name.slice(4, name.indexOf(' ', 5))} = require("./node-worker.cjs");`));
\ No newline at end of file
diff --git a/src/index.ts b/src/index.ts
index 75625e2..6706c7e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2151,11 +2151,11 @@ export function strToU8(str: string, latin1?: boolean): Uint8Array {
     }
     let c = str.charCodeAt(i);
     if (c < 128 || latin1) w(c);
-    else if (c < 2048) w(192 | (c >>> 6)), w(128 | (c & 63));
+    else if (c < 2048) w(192 | (c >> 6)), w(128 | (c & 63));
     else if (c > 55295 && c < 57344)
       c = 65536 + (c & 1023 << 10) | (str.charCodeAt(++i) & 1023),
-      w(240 | (c >>> 18)), w(128 | ((c >>> 12) & 63)), w(128 | ((c >>> 6) & 63)), w(128 | (c & 63));
-    else w(224 | (c >>> 12)), w(128 | ((c >>> 6) & 63)), w(128 | (c & 63));
+      w(240 | (c >> 18)), w(128 | ((c >> 12) & 63)), w(128 | ((c >> 6) & 63)), w(128 | (c & 63));
+    else w(224 | (c >> 12)), w(128 | ((c >> 6) & 63)), w(128 | (c & 63));
   }
   return slc(ar, 0, ai);
 }
@@ -2936,7 +2936,7 @@ export class AsyncUnzipInflate implements UnzipDecoder {
   /**
    * Creates a DEFLATE decompression that can be used in ZIP archives
    */
-  constructor(_: string, sz: number) {
+  constructor(_: string, sz?: number) {
     if (sz < 320000) {
       this.i = new Inflate((dat, final) => {
         this.ondata(null, dat, final);
@@ -2983,7 +2983,7 @@ export class Unzip {
    * @param chunk The chunk to push
    * @param final Whether this is the last chunk
    */
-  push(chunk: Uint8Array, final: boolean) {
+  push(chunk: Uint8Array, final?: boolean) {
     if (!this.onfile) throw 'no callback';
     if (this.c > 0) {
       const len = Math.min(this.c, chunk.length);
@@ -3045,10 +3045,10 @@ export class Unzip {
           break;
         } else if (oc) {
           if (sig == 0x8074B50) {
-            is = i += 12 + (oc == -2 && 8), f = 2, this.c = 0;
+            is = i += 12 + (oc == -2 && 8), f = 3, this.c = 0;
             break;
           } else if (sig == 0x2014B50) {
-            is = i -= 4, f = 2, this.c = 0;
+            is = i -= 4, f = 3, this.c = 0;
             break;
           }
         }